767 Systems (ASM 8) Flashcards
Overhead Panel Organization (gen)
H: Hydraulics
E: Electrics
F: Fuel
A: Air
Flight Controls
Landing Gear & Breaks
ACFT Electrical System Components (elec)
- Main AC Power (main source of ACFT power)
- Main DC Power
- Battery / STBY Power
AC Electrical Power Sources (elec)
- LT & RT Engine IDG’s
- APU Gen
- External Power
AC Busses (elec)
- LT/RT Main AC Busses
- LT/RT AC Transfer Busses
- CA/FO Flight Instrument Transfer Busses
- LT/RT Utility Busses
- Galley Bus
- Ground Service Bus
- Ground Handling Bus
Autoland Power Source (elec)
- Left AP and CA Flight Instrument Transfer Bus: LT Main AC System
- Right AP and FO Flight Instrument Transfer Bus: RT Main AC System
- Center AP: Batt/STBY System
Autoland: 3 independent power sources via 3 isolated busses to 3 different autopilots
Autoland Loss of Generator Above 200’ (elec)
NO LAND 3
Both Tie breakers close, remaining GEN powers both LT and RT AC bussed
LT Main System power the Center Autopilot
Autoland Loss of Generator Below 200’ (elec)
Autoland continues using remaining 2 autopilots
Both Bus Tie breakers remain open
Autopilot who’s Gen failed, remains unpowered
Flight instruments powered through the FLT Inst Transfer Busses
DC Electrical Power Source (elec)
- LT/RT Main AC Busses (through TRU’s to produce DC)
* No flight deck controls for Main AC System*
DC Busses (elec)
- LT/RT Main DC Busses
Batt/STBY Power Sources (elec)
No Power to ACFT: Source is Battery
Power to ACFT: Source is Batt Charger or LT Main DC (through Main AC)
Batt/STBY Busses (elec)
- Hot Batt Bus
- Batt Bus
- STBY AC Bus
- STBY DC Bus
HDG (elec)
Hydraulic Driven Generator
HDG (elec)
When Activated:
Power Source:
Provides Power To:
When Activated: Automatically when loss of both LT and RT Main AC Busses
Power Source: Center Hydraulic System
Provides Power To: AC 1. LT AC Transfer Bus 2. RT AC Transfer Bus 3. STBY AC Bus 4. CA Flight Inst Transfer Bus
DC
- Hot Batt Bus
- Batt Bus
- STBY DC Bus
Number of Fuel Tanks and Qty (fuel)
3 tanks
- LT Main / 6,000 gal / 40,000 lbs
- RT Main / 6,000 gal / 40,000 lbs
- Center / 12,000 gal / 80,000 lbs
Total 24,000 gal / 160,000 lbs
Fuel Low Level Warning (fuel)
LT or RT Main Tank below 2,200 lbs
Where is fuel temp taken (fuel)
RT Main Tank
of Fuel Pumps (fuel)
2 in each tank
A single pump can supply one engine
Fuel Pumps Power Source (fuel)
All 6: AC Power
DC fuel pump for APU if no AC Power (1 located in the left main)
What tanks drain first (fuel)
Center - center pumps have greater output
Center pumps automatically power off when tank is dry
How does the APU get its fuel (fuel)
Any AC fuel pump - supply’s to left fuel manifold
DC - fuel pump in the LT Main Tank
* no controls or indications * Auto Ops when no AC power*
FUEL CONFIG light (fuel)
- Imbalance, 2000 between LT and RT Main tanks
- Center fuel pump switched off with more than 1200 lbs in tank
- LOW FUEL displayed on EICAS, LT or RT Main tank < 2200 lbs
How to fix a fuel imbalance (fuel)
- Open X-Feed
2. Turn OFF fuel pumps in tank with the lowest qty
Fuel Jettison (fuel)
Tank:
Pump:
Rate:
Tank: Center Fuel Tank
Pump: 2 fuel pumps
Rate: 2600 lbs/min
How to turn on Fuel Jettison (fuel)
FUEL JETTISON selector ON
jettison transfer valves open
jettison Pumps operate
FUEL JETTISON NOZZLE switches ON
nozzle valves open
How is fuel calculated during dump (fuel)
Durning Dump
FMC discontinues calculations
Totalizer valve is used
After Dump
Calculated value will reset using totalizer value
Totalizer vs Calculated Fuel (Fuel)
Totalizer: Measurement of each tank
Calculated: Measurement of START fuel - FUEL USED
Nitrogen Generator System NGS (fuel)
Converts bleed air to nitrogen enriched air to prevent a dry center fuel tank from having explosive gasses
No flight crew action
Suction Fuel Feed (fuel)
Each engine can get fuel from its corresponding Main Tank
GND: Ok
Climb: dissolved air in the tank could cause a flame-out
Cruise: may be able to (after dissolved air depletes)
How many Hydraulic Systems (HYD)
3 systems
- Left
- Center
- Right
What does hydraulics power (HYD)
- Flight Controls
- Flaps/Slats
- Gear
- Brakes
- Nose Wheel Steering
- Tail Skid
- Autopilot Servos
- Yaw Damper
Left Hydraulic System (HYD)
Powers
Source
Powers
- Flight Controls
- Right Yaw Damper
- Stab Trim module
- Trapped fluid used by PES
Source
- Engine-Driven Primary Pump
- Electrical-Driven Primary Pump
Right Hydraulic System (HYD)
Powers
Source
Powers
- Flight Controls
- Normal Brakes
- Pitch Enhancement System (PES)
Source
- Engine-Driven Primary Pumps
- Electrical-Drive Primary Pumps